Mixing-machine.



MMSI/6,234.' PATI-INIBII DEG. s1, 19o?, M. II. AVRAM. MIXING MACHINE.

APPLICATION FILED DEO.15, 1906.

2 SHEETS-SHEET l.

No. 875,234. K PATENTED 13150.31, 1907. M. H. AVRAIVI. MIXING-MAGHINB APPLICATION FILED DEO. 15. 1906.

9. SHEETS-SHEET 2.

l'emunio amarres rarnnr cierren.

Mois H. AVRAM,

0F NEW YORK, N. Y., ASSIGNOR TO AVRAM-LEET ENGINEERTNGYCOMPANY,

Ol" NEW YORK, N. Y., A CORPORATION 0F' NEW YORK.

MIXING-MACHINE.

Specification of Letters Patent.

Patented Dec. 31, 1907.

Application filed December l5. 1906. Serial No. 347.946.

T o all whom it may concern.'

yBe it known that I, Mois H. AVRAM, a citizen of the United States, residing at New York city, New York county, New York, have invented certain new and useful Improvements in Mixing-Machines, of which the following is a full, clear, and exact description.

My invention relates to machines for mixing pulverized substances of various kinds, and is especially adapted for mixing together such substances as sand, hydrated lime and cement, and has for its object to produce an apparatus which will bring about a double mixing and from which the mixed materials can be easily discharged.

My invention also has for its object to produce an apparatus in which the material in passing through it will be subjected to dry and wet mixings in separate receptacles.

The following is a description of an embodiment of my invention, reference being had to the accompanying drawings, in which:

Figure 1 is a plan viewof the apparatus, Fig. 2 is a vertical section on the line Y-Y Fig. 1, Fig. 3 is a artial vertical section on the line Z-Z, and i`ig. 4 is a view of a detail.

Referring more particularly to the draw ings, A is a container having a bottom A and a dividing partition A2, constituting in effect two pans, the upper belonging to a dry mixer and the lower to a wet mixer. The double an A is supported on uprights B, B, Bfl at its edges, and the central sup- 'port C. This central su port C has a boss the sleeve M is secured a miter gear N which engages with'the mitergear O mounted on the s aft P, to which power is transmitted from the driving pulley L through the train of gears Q, Q, Q2, Q3. The frame YE is provided with a bridge R, which carries a sleeve M passing through the hub D on' which bears a second frame E end of the sleeve M.

In the" frames E E are journaled shafts F, F, F, F having at their lower ends paddles G G, each consisting of four blades at right angles to each other. 'The shafts F, F,'F, F are provided at thcirpupper ends secured to the upper.

with gears F, F, F, F, which are driven by intermediate gears F2, F2, W, F2, F2 also carried by the frames E E. The innermost gears F2 F2 engage with gears F mounted on the shaft H, thus making a train of three gears between the shaft and the paddles on that side. This shaft has at its lower end a miter gear, which'is engaged by a gear J on the shaft 1i driven by the pulley L. The presence of the air of intermeshing gears F2, F2 between tie gears F and F8 on the right hand side of the center (Fig. l) thus making a train of four gears between thel shaft and the first paddles on that side, and results in causing the paddles G on opposite ends of the frames to revolve in the opposite directions and to bring about a more thorough mixing action.

When power is applied to the pulley L, the two frames E E are made to revolve in one direction andthe shaft H is made to revolve in the opposite direction. The movement of the shaft H is transmitted to the paddles G, G, G, G, so that they all revolve on their axes as well as moving about the axis of the shaft H, the paddles having planetary movements. The result is that the material in the pans within the casing A is very thoroughly mixed.

The bottom of each pan is provided with four shutters, R R2, which are mounted on shafts S, S, S, S. The bell crank levers -T, T are connected to the shafts S, S, S, S',

their lower arms being connected by links U. The upper arms of the bell cranks T T are elongated so' as to act as levers and the free armsof the bell crank T T are yprovided withsprings V, orA other means, for return- Y ing the levers and their shutters to their normal position.

After the material in the upper pan has been subjected to a thorough dry mixing, itsv shutters R R2 are opened by de )rcssing the elongated arm ofthe bell cran is T, as shown in F ig.' 4, whereupon the material falls into the lower pan, where water is added and the mixing continued. The fact that the material must be quickly transferred from the dry to the wet pan and the wet vmixing must be donein small quantities and quickly (particularly when cement is used) so as to be both mixed and pressed before the materials harden, make the advantages of my double mixer very important and valuable. When the wet mixing has been completed in the provided for supplying oil to the bearing surfaces. The ears are each covered with protectors W, so that 'no dust or dirt can make any contact with them. The paddles -will have some movement on their respective axes even if the-shaft I-I-is held stationary. I prefer, however, to give it a positive movement of rotation in a direction oppositeto that of the frame E.

The apparatus above. described runs con-.

tinuously and is mixing materials in one pa-n or the other, or both. By reason ofthe dry mixing a thorough distribution and intimate 'intermingling of the contents is effected.

The material can easily be transferred to the wet mixing' pan, whenever desired. In practice it slhould be kept out of the wet pan until it'. is necessary to wet mix a vfresh quantity. y

The bearing surfaces are all above the material to'be mixed, and are, therefore, Aremoved as far as possible from it,'so as to be kept away from the gritl and the lparts are easy of access should inspection or repairs be necessary. 4

What I claim is:

1. In a mixer, the combination of a pan, a revoluble sleeve concentric therewith,l a frame carried thereby, paddles carried by said frame and revoluble relatively thereto, a shaft within said sleeve geared to said addles said sleeve being revoluble relative y to said shaft, and means for causing said sleeveI to revolve about its own axis.

' 2. In a mixer, thecombmation of a pan, a revoluble sleeve concentric therewith, a

J frame carried by said sleeve, paddles carried by said frame and revoluble relatively thereto, a shaft within said sleeve geared to said paddles said sleeve being revoluble relatively to said shaft, and means for causing said sleeve and said shaft to revolve relativel to one another and to the pan about the axis of i said sh aft.

3. In va mixer, the combination of two ans, each having a bottoni, a revoluble rame in said lower pan, and a'revoluble,

frame in said upper pan carried by the frame in saidlower pan and vfixed relatively to Said lower frame, paddles carried by said frames.

t means for causing said frames and said shaft to revolve independently.

.geared to said carrie 4. In a mixer, the combination of a pan having al centralboss arising from its bottom to a considerable distance, a frame resting thereon and having a depending sleeve ex,.

tending through said boss, paddles rotatably mounted in said frame, a shaft passing through said sleeve, said shaft having a bearing supported on top ofsaid frame `and addles, and means for revolving said sha t and said frame respectively relatively to one another andto the pan.

5. In a mixer, the combination of a pan, a frame therein, a sleeve connected thereto, a shaft assing through said. sleeve, addles di by said frame and revolub e relaftively thereto-,- gearing connecting said paddles to said shaft, a cover for said gearing also carried by said frame and revoluble with said frame, and means for driving said frame, connected to the lower end of'said sleeve.` 6. In a mixer, the combination of a pan, a revoluble Aframe therein, a sleeve connecte thereto, a shaft4 assin through said sleev paddles carried y sai frame `and revolub e paddles to said shaft, a cover for said gearing also carried by said frame and revoluble With said frame, and means [or applying power to the lower ends of said sleeve and said shaft for driving the same. i

7'. In a mixer, the combination .of a pan, a frame mounted to revolve therein, addles carried by said frame and revoluble re ativelv thereto, and a shaft concentric with the axis' of revolution of said frame and revoluble relatively tosaid frame, caring connecting saidshaft and said paddlges, and means for driilfing said shaft and said frame independent y.V y

. 8. In a mixer, the combination of a pan, a frame therein' revoluble relatively to said pan,'paddles cairied' by said frame on both sides of the center thereof and revoluble rela'-l tively thereto, a shaft concentric withthe axis, of revolution of said'frame, gearing connecting said paddles to said shaft the caring connecting said shaft tothe first'pa dle on one side having an odd number of gears, and the gearing connecting said shaft to the padrelatively thereto, gearing connecting saidj I dles on the other side having an even num- 

